210 

 -O 



THE FLOWERING PROCESS 





!0 



iO 



13. Quantitative long-day plants; no direct 



Brassica rapa, H. 22 

 Dianthus prolifer, C. 218 

 Fragaria chiloensis, H. 19 



Hordeum vulgare, H. 23, C. 197, Fig. 1- 

 Nicotiana Tabacum, H. 65 

 Nigella arvensis, C. 218 

 Nigella damascena, C. 218 

 Oenothera rosea, C. 218 

 Pisiim sativum, H. 13 

 Scrofularia argiita, C. 218 

 Secale cereale, H. 40, C. 193 

 Solamim tuberosum, H. 15 

 Sonchus oleraceus, H. 117 

 Sorghum vulgare, H. 45 

 Triticum aestivum, H. 51, C. 197 



temperature effect. 

 Turnip 



A variety of everbearing 



strawberry 

 Spring barley 

 Havana tobacco 

 Fennel-flower 

 Love-in-a-mist 

 Evening primrose 

 Garden pea, 2nd variety 



Spring rye 



A variety of potato 



Sowthistle 



Sorghum 



Spring wheat 



14. Quantitative long-day plant at high temperature; day-neutral at low 

 temperature. No causative eflfect of temperature. 



Anthemus cotula, H. 107 

 Antirrhmum majus, H. 99 

 Begonia semperflorens, H. 72 

 Centaur ea cyanus, H. 78 

 Matthiola incana, H. 100, C. 206 

 Medicago sativa, H. 54 

 Petunia hybrida, H. 94, C. 198 

 Poa pratensis, H. 28 

 Solanum nigrum, H. 114 

 Vicia sativa, H. 67 



Dog fennel 



Snapdragon 



Begonia 



Cornflower 



German stock 



Alfalfa variety 



Petunia 



Kentucky bluegrass 



Nightshade 



Spring vetch 



15. Quantitative long-day plants promoted by low temperature. 



Agrostemma githago, C. 218 Corncockle 



Allium cepa ? H. 12 Onion variety 



Cichorium endivia, C. 201 Endive 



Lactuca sativa, H. 11, C. 200 Lettuce 



Oenothera strigosa, H. 115 Evening primrose 



Sinapis alba {Brassica hirta), C. 218, 206 White mustard 

 Trifolium spp., H. 57 Clover 



16. Quantitative long-day plants promoted by high temperature. 



Callistephus chinensis, H. 69 China aster 



17. Quantitative long-day plants promoted by temperature alternation. 



Ly coper sicon esculent um, H. 21 Tomato, 2nd variety 



18. Quantitative long-day plants: low temperature required. 



Campanula persicaefolia, C. 204 



„ alliariaefolia 



„ primulaefolia 



Cheiranthus cheiri, C. 2 1 3 , 2 1 8 Wallflower 



Cynosurus cristatus, C. 21 1 Dogtail 



Daucus carota, H. 7, C. 203 Carrot 



Dianthus barbatus Sweet William 



